Medium temperature coal asphalt manufacturer Mengbei
Oxidation. Coal pitch reacts with oxygen in the air in the natural environment, causing a change in its chemical structure. The oxidation process will break the molecular chain of coal pitch, reduce its viscosity and stability, and eventually lead to its failure. Oxidation is one of the main mechanisms of coal pitch failure, especially when exposed to sunlight, high temperature and humidity, the oxidation rate will be accelerated.
Temperature effects. Temperature also has an important influence on the failure mechanism of coal pitch. In a high-temperature environment, the molecular chain of coal pitch will be thermally degraded, resulting in a decrease in its viscosity and stability. In addition, changes in Wendi will also affect the annual value of coal asphalt, making it difficult to maintain stability in an environment with large temperature changes.
Ultraviolet radiation.
Ultraviolet irradiation will cause changes in the chemical structure of coal asphalt, especially the unsaturated hydrocarbons in which they are easily decomposed by ultraviolet rays, which will lead to changes in the physical and chemical properties of coal asphalt, such as darkening color, increasing viscosity, etc., and eventually leading to failure.
Chemical corrosion. Coal pitch contains a variety of chemical components, which are easy to react with calculations, alkalis, salts and other substances, resulting in the destruction of its chemical structure. Chemical corrosion can make coal pitch lose its viscosity and stability, making it unusable for normal use.
Microbial attack.
In some environments, microorganisms may erode coal pitch, causing changes in its physical and chemical properties. Microbial erosion usually leads to spots, discoloration and other phenomena on the surface of coal asphalt.
In summary, the failure mechanism of coal pitch mainly includes oxidation, temperature influence, ultraviolet exposure, chemical corrosion and microbial erosion. Understanding these mechanisms can help to better apply and maintain coal pitch and extend its service life.